Doorlock device for an electric home appliance

Abstract

The doorlock device according to the present invention comprises a latch which is attached to a door for closing it, a cover including a latch opening and a latch slider which is elastically supported due to the insert of the latch, a locker which restricts the latch slider, a slider which moves the locker up and down, a solenoid which pushes a push cam in accordance with control signal to rotate a rotation cam so that the slider is moved left and right, a housing including the locker, the solenoid and a contact point part in which electric signal is inputted, a locker withdrawal part which forcibly withdraws the protruded locker by the operation of a torsion spring which is elastically supported, thereby separating a movable plate from a fixed plate upon abnormal withdrawal of the latch. According to the doorlock device of the present invention, the push cam operated by the solenoid causes the eccentric part of the rotation part to move the locker vertically, thus resulting in the latch slider being held or released by the locker. This bring about an effect that the structure of the doorlock device can be simplified, so that it becomes easier and cheaper to manufacture the doorlock device. Further, it is possible to provide a doorlock device whose operation credibility is improved. Still further, it is possible to provide a doorlock device which stops the operation of the electric home appliance when the latch is withdrawn abnormally.

1 . A doorlock device for an electric home appliance, comprising: a housing  200  having a PTC receiving part  550 , a contact point part  500 , a solenoid  600 , a cam housing  700  which is operated by the solenoid  600 , and a locker  800  which is operated by the cam housing  700 ; a cover  300  which is combined with the housing  200  and includes a latch opening  300  through which a latch  100  is inserted and on which a locker opening  301  is provided through which a locker  800  vertically moves in and out; and a latch slider  400  which is pushed by the insert of the latch  100  and is elastically supported by a latch slider spring  410  provided on the upper surface of the cover  300 , wherein the solenoid  600  includes a solenoid case  630  and a solenoid plunger  610  placed in the center of a bobbin  620  upon which electric wire is wound, the one end of the solenoid plunger  610  being received in the cam housing  700 , in which a push cam  710  and a rotation cam  720  rotated by the reciprocating motion of the push cam  710  are placed, and wherein an eccentric part  721  is provided at the one end of the rotation cam  720  which is formed to be eccentric relative to the shaft axis of the rotation cam  720 , and a slider  750  is provided to be in engagement with the outer surface of the eccentric part  721 . 
   
   
       2 . The doorlock device of  claim 1 , wherein three oblique angle parts  722  are arranged on outer surface of the rotation cam  720  in 120° angular distribution along the circumference of the rotation cam  720 , wherein the solenoid plunger  610  pushes the push cam  710  placed in the cam housing  700  in response to the control signal of the solenoid  600 , thus the push cam  710  pushing the rotation cam  720  and rotating it by 120° simultaneously. 
   
   
       3 . The doorlock device of  claim 1 , further comprising: a locker withdrawal part  900  which is combined with the cover  300  through a hinge-joint and is rotated by the insert of the latch  100  about the hinge-joint; and a torsion spring for elastically supporting the hinge withdrawal part  900  against the direction in which the latch  100  is inserted, wherein the locker withdrawal part  900  is provided with a protrusion  910  in the upper area of the locker  800  for forcibly withdrawing the locker  800  through the operation of the torsion spring upon the abnormal withdrawal of the latch  100 . 
   
   
       4 . The doorlock device of  claim 3 , wherein the locker withdrawal part  900  is provided with a latch slider fixer  940  and the latch slider  400  is provided with a fixing recess  400  which engages with the latch slider fixer  940 . 
   
   
       5 . The doorlock device of  claim 1 , further comprising a locker withdrawal part  901  which is combined with the cover  300  through a hinge-joint such that its hinge joint hole  931  is in communication with hinge joint protrusions  932 , 933  which are shaped to protrude on the cover  300 , the locker withdrawal part  901  comprising in its underpart a rib engagement part  921  corresponding to a front rib  960  and a rear rib  961  each of which is formed on the latch slider  400  to have a predestined angle, and a protrusion  911  which strikes on the head surface of the locker  800 , the locker withdrawal part  901  being elastically supported by a torsion spring. 
   
   
       6 . The doorlock device of  claim 5 , wherein the rib engagement part  921  further comprising a wheel component which is rotatable.